Re: Re: Ampl. Red HVU, how many still work?

At 01:58 pm 26 10 2003, you wrote:
>I am finally getting ready to go through my stack of Amplifone parts that
>I have and I was wondering what the chances are that any of the HVU boards
>have good red flybacks. A few have blown 24V regulators, etc. Does the
>flyback kill those? Does the flyback die silently or crack like raster ones?

I have 4 HV boards that either have or had red HVTs. All but one were DOA,
but I had one that was working until about 6 weeks ago when it died.

Most of the dead boards I've seen (I'm sure there are many here that have
worked on more than me) had either a bad +/-24v regs or a bad BU406. The
one I had that was working did not do this though, instead it heated up the
big 50ohm ballast resistor on the -24v Reg till it go so hot it melted a
hole right through the PCB. The house stank for about 3 weeks :o(

After the HVT failed I tested the board with a dummy load and it would have
worked with a wintron fitted no problems, however I went the cheap option
and got an arcadeshop board for it ....

Dave Langley
www.robotron-2084.co.uk

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Received on Sun Oct 26 13:43:17 2003